Child Support Past 18 in Iowa: High School Graduation and Age Limits

By the FigureMyTax Editorial Team · How we calculate

In Iowa, child support runs to 18, and between 18 and 19 for a child in school full-time to finish high school or an equivalency before turning 19. A disabled child of any age can be included.

What is the child support age limit in Iowa?

Eighteen for a minor child, with a statutory extension. Support obligations include support for a child between 18 and 19 who is engaged full-time in completing high school graduation or equivalency requirements in a manner that is reasonably expected to result in completion before the child turns 19 (Iowa Code 598.1(9)).

Does child support continue through high school in Iowa?

Yes, within those limits: full-time, working toward graduation or an equivalency, and expected to finish before the 19th birthday. A child who is behind and will not finish by 19 falls outside the extension, so keep school records.

What date does Iowa child support end? Examples

The usual end date is the 18th birthday, and the cap for a high school student is the 19th:

Try your own date in the Iowa child support end date calculator.

What is the practical difference between 18 and 19 for payment?

A parent paying $800 a month would pay about $9,600 for a year between the 18th and 19th birthdays if the child qualifies, so the date matters. Calendar the 18th birthday, gather the school letter before it and ask the court in writing to confirm which date applies if the other parent disputes it.

Is medical support part of the child support amount?

For orders entered on or after July 1, 1990, unless the court specifically orders otherwise, medical support is not included in the monetary amount of child support (598.1(9)). When support ends, check separately whether the medical support terms in your order also end.

How do you show the child is on track to graduate?

Keep a current transcript or enrollment letter from the school or program showing full-time attendance and the expected completion date. The statute asks whether completion before the 19th birthday is reasonably expected, so a letter from the school before the child turns 18 is the best evidence.

What if the child turns 19 before finishing?

Support under this provision stops at 19: the extension covers a child between 18 and 19 who is reasonably expected to finish before the 19th birthday. A child who is not expected to finish by then is outside it. Ask an attorney about options, including any agreement between the parents.

What if my order says something different?

Read it. The order, and any later modification the court approved, controls the end date. If it needs changing, file a petition to modify. A private agreement does not change a court order unless the court approves it (598.21C(3)).

Do I have to file to end child support at 18?

The withholding order stays in place until it is changed. Ask the court or Child Support Services to end it in writing, and keep proof of the child’s birth date and graduation. See how to modify child support in Iowa.

Do arrears end when child support ends?

No. Installments already owed stay owed and interest continues to run. See the Iowa child support arrears calculator and how long arrears last.

Frequently asked questions

Official sources

• Iowa Code 598.1: definition of support
• Iowa Code 598.21F: no postsecondary education subsidy
• Iowa Code 598.21C: modification
• Iowa Code 535.3: interest

This is general information, not legal advice. It is based on the cited Iowa statutes, rules and court opinions, and every case turns on its own facts. Confirm how the law applies to your situation with a licensed Iowa attorney.